fix(#758): DictUtils 移除 fastjson2，统一使用 jackson

- com.alibaba.fastjson2.JSONArray → jackson ObjectMapper
- com.alibaba.fastjson2.JSON.toJSONString/parseObject → mapper.writeValueAsString/readValue
- 项目统一使用 jackson，不再依赖 fastjson2

healthlink-his-server/core-common/src/main/java/com/core/common/utils/DictUtils.java

@@ -1,6 +1,7 @@
 package com.core.common.utils;
 
-import com.alibaba.fastjson2.JSONArray;
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
 import com.core.common.constant.CacheConstants;
 import com.core.common.core.domain.entity.SysDictData;
 import com.core.common.core.redis.RedisCache;
@@ -46,19 +47,17 @@ public class DictUtils {
             if (cached == null) {
                 return null;
             }
-            if (cached instanceof JSONArray arrayCache) {
-                return arrayCache.toList(SysDictData.class);
-            }
             if (cached instanceof List<?> list) {
                 // Redis缓存可能已反序列化为List，尝试逐个转换
                 java.util.ArrayList<SysDictData> result = new java.util.ArrayList<>(list.size());
+                ObjectMapper mapper = SpringUtils.getBean(ObjectMapper.class);
                 for (Object item : list) {
                     if (item instanceof SysDictData dictData) {
                         result.add(dictData);
                     } else {
-                        // 尝试通过JSON转换
-                        String json = com.alibaba.fastjson2.JSON.toJSONString(item);
-                        result.add(com.alibaba.fastjson2.JSON.parseObject(json, SysDictData.class));
+                        // 通过 Jackson JSON 转换
+                        String json = mapper.writeValueAsString(item);
+                        result.add(mapper.readValue(json, SysDictData.class));
                     }
                 }
                 return result;